Startprobleme CAY | Posts 16+

"Things were better in the old days; I wish I could get my AAZ back."

Hello everyone,

Thank you for the advice.

New findings (besides cold feet):

Spark plugs checked (if the wiring to the plug were only 1 cm longer, it would be very easy to remove the connector from the recess ).

1. Multimeter readings show 0 ohms for all four candles, indicating continuity.
2. Bulb trick: Connect an H7 bulb in series; it will illuminate all the candles with roughly the same brightness (estimated by eye).

So, the candles are fine, I would say.

I also replaced the diesel filter; the old one had a marking of 4/21, so it wasn't the first one used =)

But before all of the things mentioned above, I gave our Audi a jump start

dieselschrauber wrote:

(using standard 16mm² jumper cables with alligator clips), and the Polo started much better. It cranked for 2-3 seconds...
However, the temperature is only 0°C now.

Perhaps the battery is simply too weak? It's a Varta with 52Ah capacity. It feels like it could easily accommodate double that capacity. However, the battery still looks quite new...

What would you do? Would you replace it based on suspicion (and then immediately install the largest possible size that fits), or would you continue investigating?


Below a certain threshold, the starting process may be blocked depending on the engine control unit.
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"The idle speed would therefore be another (logical) candidate. I'd rule out the glow plug for now - without fuel injection, I can pre-glow like a champion. This would explain the lack of white smoke and also why it makes absolutely no difference whether you pre-glow once or ten times."
What RPM would I need to have for the injectors to inject }?

Have a nice weekend and best regards.
David.

The starting signal comes from the MSG (presumably a control system), not solely from the starter motor as with a Lanz tractor.

Rüdi wrote:

Die Freigabe zum Anspringen kommt vom MSG und nicht wie beim Lanz Bulldog durch reine Anlasser Orgelei.

Korrekt. Raildruck muss einen Mindestwert erreicht haben, ebenso die Motordrehzahl.

It would be relatively time-consuming for me to determine the exact values without Damos's technical documentation for your ECU, but it is possible.

There are more aspects to consider when it comes to launch authorization than one might imagine; for example, see document TPI 2012460/4 (just one example).

@Rainer
What should the names of the two values in Damos be?

The temperatures have been fluctuating between approximately -5°C and 0°C for the past few days.
The Polo started just as well/badly as it did when I tried jump-starting it. So, the battery isn't the problem either... Since the starting behavior is currently acceptable for me, and (the main reason) I unfortunately have completely different and more serious problems right now, I'll leave it at that for now. I just don't have the energy or motivation to deal with it. It should be getting warmer soon anyway...Thank you again to everyone. Maybe I'll continue working on this during the next cold spell and eventually solve the puzzle.

Best regards,
David.

chli1976 wrote:

@Rainer Wie sollen die beiden Werte im Damos heißen?

Hi, you have a private message!